<!DOCTYPE html
    PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

<head>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <style>
        .tagBall {
            width: 800px;
            height: 800px;
            margin: 50px auto;
            position: relative;
            background-color: #041633;
            border-radius: 100%;
        }

        .tag {
            width:200px;
            display: block;
            position: absolute;
            left: 0px;
            top: 0px;
            color: #000;
            text-decoration: none;
            font-size: 15px;
            font-family: "微软雅黑";
            font-weight: bold;
        }

        .tag:hover {
            border: 1px solid #666;
        }
        .inner{
            display:inline-block;
            position: absolute;
            transform:translate3d(0,50px,0px);

        }
    </style>
    <title>3D标签-柯乐义</title>
</head>

<body>
    <div class="tagBall">
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
        <a class="tag" target="_blank"><span class="inner">某某某</span></a>
    </div>
    <script type="text/javascript">
    let timer;
        var tagEle = "querySelectorAll" in document ? document.querySelectorAll(".tag") : getClass("tag"),
            paper = "querySelectorAll" in document ? document.querySelector(".tagBall") : getClass("tagBall")[0];
        RADIUS = 300,
            fallLength = 500,
            tags = [],
            angleX = Math.PI / 500,
            angleY = Math.PI / 500,
            CX = paper.offsetWidth / 2,
            CY = paper.offsetHeight / 2,
            EX = paper.offsetLeft + document.body.scrollLeft + document.documentElement.scrollLeft,
            EY = paper.offsetTop + document.body.scrollTop + document.documentElement.scrollTop;

        function getClass(className) {
            var ele = document.getElementsByTagName("*");
            var classEle = [];
            for (var i = 0; i < ele.length; i++) {
                var cn = ele[i].className;
                if (cn === className) {
                    classEle.push(ele[i]);
                }
            }
            return classEle;
        }

        function innit() {
            for (var i = 0; i < tagEle.length; i++) {
                var a, b;
                var k = (2 * (i + 1) - 1) / tagEle.length - 1;
                var a = Math.acos(k);
                var b = a * Math.sqrt(tagEle.length * Math.PI);
                // var a = Math.random()*2*Math.PI;
                // var b = Math.random()*2*Math.PI;
                var x = RADIUS * Math.sin(a) * Math.cos(b);
                var y = RADIUS * Math.sin(a) * Math.sin(b);
                var z = RADIUS * Math.cos(a);
                var t = new tag(tagEle[i], x, y, z);
                tagEle[i].style.color = "rgb(" + parseInt(Math.random() * 255) + "," + parseInt(Math.random() * 255) + "," + parseInt(Math.random() * 255) + ")";
                tags.push(t);
                t.move();
            }
        }

        Array.prototype.forEach = function (callback) {
            for (var i = 0; i < this.length; i++) {
                callback.call(this[i]);
            }
        }

        function animate() {
            timer=setInterval(function () {
                rotateX();
                rotateY();
                tags.forEach(function () {
                    this.move();
                })
            }, 20)
        }

        if ("addEventListener" in window) {
            paper.addEventListener("mousemove", function (event) {
                var x = event.clientX - EX - CX;
                var y = event.clientY - EY - CY;
                // angleY = -x* (Math.sqrt(Math.pow(x , 2) + Math.pow(y , 2)) > RADIUS/4 ? 0.0002 : 0.0001);
                // angleX = -y* (Math.sqrt(Math.pow(x , 2) + Math.pow(y , 2)) > RADIUS/4 ? 0.0002 : 0.0001);
                angleY = x * 0.0001;
                angleX = y * 0.0001;
            });
        }
        else {
            paper.attachEvent("onmousemove", function (event) {
                var x = event.clientX - EX - CX;
                var y = event.clientY - EY - CY;
                angleY = x * 0.0001;
                angleX = y * 0.0001;
            });
        }

        function rotateX() {
            var cos = Math.cos(angleX);
            var sin = Math.sin(angleX);
            tags.forEach(function () {
                var y1 = this.y * cos - this.z * sin;
                var z1 = this.z * cos + this.y * sin;
                this.y = y1;
                this.z = z1;
            })

        }

        function rotateY() {
            var cos = Math.cos(angleY);
            var sin = Math.sin(angleY);
            tags.forEach(function () {
                var x1 = this.x * cos - this.z * sin;
                var z1 = this.z * cos + this.x * sin;
                this.x = x1;
                this.z = z1;
            })
        }

        var tag = function (ele, x, y, z) {
            this.ele = ele;
            this.x = x;
            this.y = y;
            this.z = z;
        }

        tag.prototype = {
            move: function () {
                var scale = fallLength / (fallLength - this.z);
                var alpha = (this.z + RADIUS) / (2 * RADIUS);
                this.ele.style.fontSize = 15 * scale + "px";
                this.ele.style.opacity = alpha + 0.5;
                this.ele.style.filter = "alpha(opacity = " + (alpha + 0.5) * 100 + ")";
                this.ele.style.zIndex = parseInt(scale * 100);
                this.ele.style.left = this.x + CX - this.ele.offsetWidth / 2 + "px";
                this.ele.style.top = this.y + CY - this.ele.offsetHeight / 2 + "px";
            }
        }
        innit();
        animate();
    </script>
</body>

</html>